In the past I have only had a little of this in the lawn, but this year------------
It has a white flower.
(http://img.photobucket.com/albums/v633/terrywarner/Weed09.jpg?t=1242904108)
Bitter Cress?
looks a bit like stitchwort (greater). Pretty plant
Looks like what we call chickweed... but don't usually get it in lawns... :-\
Mouse-eared chickweed (http://www.dgsgardening.btinternet.co.uk/mousear.htm).
looks like this to me!!
http://www.dgsgardening.btinternet.co.uk/chickwed.htm
Thanks for all your replies!
Chickweed it is then.
Don't mind weeds in general - but my lawns are my pride, & I've started the death sequence.
:D
budgies love it :)